ebook-extract

#!/bin/sh

usage(){
	fmt <<EOF
DESCRIPTION
	Extract an epub or a mobi ebook into FILENAME.extracted/, or into the specified new target directory.
	
USAGE
	ebook-extract [-d,--destination=DIRECTORY] FILENAME
EOF
	exit
}
die(){ printf "Error: ${1}\n" 1>&2; exit 1; }
require(){ command -v $1 > /dev/null 2>&1 || { suggestion=""; if [ ! -z "$2" ]; then suggestion=" $2"; fi; die "$1 is not installed.${suggestion}"; } }
if [ $# -eq 1 ]; then if [ "$1" = "--help" -o "$1" = "-h" ]; then usage; fi fi
#End boilerplate

outputDir="."
mobiExtractorPath="/usr/local/bin/mobi_unpack.py"
filename=""

require "${mobiExtractorPath}" "See: http://wiki.mobileread.com/wiki/KindleUnpack"

if [ $# -eq 0 ]; then
	usage
fi

for i in "$@"
do
case $i in
	-d=*|--destination=*)
		outputDir=$(echo "${i}" | sed 's/[-a-zA-Z0-9]*=//')
	;;
	*)
		filename="${i}"
	;;
esac
done

if [ "${outputDir}" = "." ]; then
	outputDir="${outputDir}/$1.extracted/"
fi

if [ -d "${outputDir}" ]; then
	die "${outputDir} already exists."
fi

if [ "${filename}" = "" ]; then
	usage
fi

#Handle .mobi files
if file "${filename}" | grep -i ": Mobipocket E-book" > /dev/null 2>&1; then
	require "${mobiExtractorPath}" "See: http://wiki.mobileread.com/wiki/KindleUnpack"
	mkdir "${outputDir}"
	"${mobiExtractorPath}" "${filename}" "${outputDir}" > /dev/null

#Handle .epub files
elif file "${filename}" | grep -i ": EPUB" > /dev/null 2>&1; then
	mkdir "${outputDir}"
	unzip "${filename}" -d "${outputDir}" > /dev/null
else
	die "Unrecognized ebook file."
fi